Liquid-feed system



March 18 1924.

' 1,48 7,462 E. R. HUNTLEY LIQUID FEED SYSTEM Original Filed April 26.1920 2 Sheets-Sheet 1 Fiq. .I:

INVENTOR. Ernest 1P..Hunt19 A TTORNEY' March 18 1924.

Original Filed April 26 1920 2 Shets-Sheet 2 m q u 6 1 1 RM: me H u 5 iw 4 mm M Y O 9 mm W 4 5 u m z m 5 4 m H. M 5 e R A 4 t S e 4 r 7 m u E 1m m 12 M 8 7 I. a 5 n i z mm W 4 WM v m W, m w 7 A M mm mm 4 a 7 L 6 .0w Q m 66,6 V m/yfiz 71% I Z 6 4 4 Patented Mar. 18, 1924.

UNITED STATES PATENT OFFICE.

Banners. HUNTLEY, or 'ronieno, OHIO, nssrenon TO INDUSTRIAL con.-

PORTION, OF TOLEDO, OHIO, ACOBPORATION OF DELAWARE.

A LIQUID-FEED sYsrEM. a

.Epplicatlon filed April 26, 1920, Serial No. 376,437. Renewed August 3,1922. Serial No. 578,478.

To all whom it may concern:

Be it known that I, ERNEST, R. HUNTLEY, fuel tank shown in approximatelythe posia citizen of the United States, residing at tion which the mainfuel tank ordinarily I Toledo, in the ceunty of Lucas and State occupieswith relation to the engine in comof Ohio, have invented certainnew anduse- .mon automobile practice.

ful Improvements in Liquid-Feed Systems, The casting, in which islocated the two of which I' declare the following to be a piston pumpemployed in my invention,

full, clear, and exact description. may be mounted upon the crank case11 by This invention relates to improvements means of machine'screws 14:and may have in liquid feed systems, and consists pria tubular portion'15 projecting through the marily in means for raising liquid from acasing. The casting, including the tubular low level tank to a highlevel receptacle by portion 15, is cored out to form a slide-way suctionwhich is relieved intermittently to for a plunger .16 mounted upon theend of prevent the fluid from being drawn into a rod 17, the "plunger tobe moved in one the suction pump. The invention consists direction by acam-18, or the like, driven also in means for automatically cutting ofiby the engine. The motion in the opposite crank "case 11 and acarbureter 12. His 8. Y

the suction to stop the pumping action direction is produced by a, coilspring 19.

whenever the use of liquid falls below the which bears at one endagainst the plunger quantity capable of being furnished by the 16 and atthe opposite end. against the expump. v p tremity of the cored outportion. 7 4

The principal object of the invention is. The forward end of the castingis merely the provision of means for accomplishing a shell for a chamber20 open to'the atmosthe above results by comparatively simple phere;through a. port 21".. I Opening backand inexpensive apparatus of acharacter wardly out ofv this chamber in vertical alignnot like to getout of order. a

A further object of the invention is the, rod 17 and the-cored outp0rtion9, are an provision of a fuel umping means, in which oilcylinderf 22 and an air cylinder 23. In the pump is located in the samecasing with the former. slides a disk 24c'which has a foran oil pump,the two pumps being driven wardly exten ing rod 241- A h llow pistonment with and upon opposite sides of the 30 from the engine by asinglecam 'orother 25 slides in cylinder 23. The head of pisequivalent means.ton 25 is providedIwith a port 26 adapted Other objects, and objectsrelating to details of construction and-feconomies' of to its seatduring the suction stroke of the manufacture will appear as I proceedwith piston by the action of a coil spring 28, as the description ofthat embodiment of the well as by air pressure. C Piston 25 is fixedinvention, which, for the purposes of the upon a rod 29 through which isa central present application, I have illustrated in the bore 30 actingas an air passa e for'the disaccompanying drawings, in which: charge ofair ,from the cylin er during the V Figure I is a more or lessdiagrammatic inward stroke of the piston. The cyllnder.

view showing in elevation an automobile 23 is provided with a port 8 forthe admisengine and fuel tank with my invention ap" sion of air attheend of the suction stroke. plied thereto. Rods 24' and 29 areconnected at their outer Fig. H is a central, vertical, sectionalextremities by-a yoke 31 through the center view through a double pistonpump which A of which the rod 17 extends and to which may be employed inmy-invention. i it is secured bya nut 32 or other suitable Fig. III is avertical transverse section means. a taken substantially on the lineIll-Ill, At its rear end the cylinder 22 is in cemlFig. H. I municationupon opposite sides with valve lFig. IV is a central, vertical,sectional. chambers 33 and 34 containing ballchecks view through a highlevelreceptacle and-'35 and 36 respectively. .The ball 35 is pumpingchamber. e j. pressed towards its seat by acomparatively Similarreference characters refer to like heavy spring '37, while the ball 36is parts throughout the views. a ressed towards its seat by? a somewhatReferrin to the drawings, 10 indicates ighter spring 38. Nipples '39 andto are an internal combustion engine having a; secured in the castingopposite the chamto. becovered by a .flat check valve 2'Z held 4 i aninclination.

'ing therethrougln 1 member 61 is threaded a nipple 65 which 45 containsa valve chamber 66 in which there i A clamping nut 68 the 65 forms aunion with the upper extremit of a pipe 69 leadi I 55 of the tank.

5 where its 60 auxiliary tank bers33 and 34. These nipples are threadedto receive clamping nuts 41 which retain in, position pipes 42 and 43for conducting I of which a pipe 47 is secured to the casting.

The lower end of this pipe communicates with an oil reservoir in thebottom of th crank case.

The air cylinder 23 is connected at its rear end by means of a nipple 50and clamping nut 51 to the pipe 52 which leads to the upper'end of afloat chamber 53. The latter includes a top 54 which has a centralupwardly extending nipple to take a clamping 2 nut 55, holding the pipe52 in place an forming a tight joint therewith. The lower.

end of the bore of this nipple constitutes a valve seat into which fitsa conical valve iece 56, having a stem 57 ided near its 1 ower end inaperforated plate 58. A float 59 mounted upon the stem 57 is adapted toraise the valve piece to shut ofl communication with the pipe 52whenever the liquid in the float chamber reaches a predetermined level.

The bowl 60 of the float chamber is ex- 1 tended into a member 61roughly tubular in shape, the interior of which is in communicatlon withthe float chamber throu h the perforations in plate 58. The mom 'r 61has a tubular arm 62 extending upwardly at A flat check valve 63 ismounted upon the end of this arm to close l by gravity, the valve beingpivoted, guided,

and at the same time held from too great I movement by a doubly bentwire 64 fixed 1n ite sides of the o nth'e'arm62 upon op K o the lowerend 0 the is located a flat u wardl opening check valve 67. The cham ranpassages located within the valve 56, 63 and 67 together make up whatIcall m umping. chamber. d ed onto the nipple back to the main tan 63 andextending ownwardly through the top thereof toa position near the bottomThe pumping chamber through valve 63 into the hi h level receptacle. Inthe embodiment i ustrated, this high level rece tacle takes the form ofan 70, fixed upon and surround ing the pumping chamber. However, I wishto have it understood that this arrangem is merely a preferredembodiment, rather than an essential form of apparatus, as it deliversfluid tank might be omitted and the fuel delivered directl from thepumping chamber into the float chamber of the carbureter. In that eventthe carbureter itself would be the high level receptacle hereinafterreferred to.

In the top of the auxiliary tank 7 O I make a small port 71 for theadmission of air, in order that the pressure within this tank may beatmospheric. A pipe 72 is connected with the bottom of the tank by meansof a nipple 7 3 and clamping nut 74 and empties into carbureter 12,which is mounted upon the en ine at a level lower than the tank in 0 erthat it may be fed by gravity from that tank.

Operation.

The lunger 16 and rod17 reciprocate at cylinder 22 from the reservoir inthe bottom of the crank case through pi e 47 and nipple 46 past ballcheck 45 and through valve chamber44. Upon the com ression stroke of theiston this char 0 oil is forced past ba checks 35 am? 36 through valvechambers 33 and 34 and nipples 39 and 40 out through pipes 42 and 43 tothe arts of the engine in need of lubrication. t is assumed that morelubrication is needed by the parts served by pi 43 than those served by(pipe 42, and to this end the spring 38-is ma e of lighter wire thanspring 37, thus enabling the'pump pressure to unseat ball check 33 for alonger time than ball check 35. After the oil flows through the bearingsto be lubricated, it flows back again by %avity to the bottom of thecrank case.

us it is kept in circulation.

The raising of fuel is accomplished by the production intermittently ofa partial vacuum in the pumping chamber, the pressure in the pumpingchamber being substantially atmospheric 1n the intervals between thesuction impulses. The suction pump opcrates at a speed pro ortional tothe speed of the engine, but fue is raised in amounts suflicient only tomeet the requirements of the e 'he, the action of the pumping chamberbeing automatically controlled. During each outward or forward stroke ofpiston 25 the air contained in the top of the pumping chamber and in thepipe 52 is partially ex austed. This enables atmospheric pressure on thetop of the fuel in the main" tank to force fuel out through pipe 59 pastcheck valve 67 into the pumping chamber, the check valve 63 remainingclosed. As soon as the port is uncovered by the piston in its forwardmotion air rushes into the cylinder ent v23 and thence through pipe 152to the tophof t e pressure t us the pum ing chamber, an

conveye to the top of the liquid in that 65 will be perfectly obviousthat the auxiliary chamber closes check valves 67 and opens memes checkvalve 63 permitting a certain amount of fuel to be discharged'throughthe latter valve into the high level receptacle, which in the presentinstance, is the auxiliarytank 70. Upon the inward stroke ofthe piston25 the .check 27 opens permitting passage of air through port 26 in thepiston head and through passage 30 in the rod 29, thus tending toequalize the pressure on both sides of the piston. Fuel as requiredbythe carbureter in the meantime flows through pipe 72 to the carbureterbowl. The apparatus is so designed, however, as to be capable offurnishing fuel in excess of the needs of the carbureter. Hence, theauxiliary tank 70 soon fills. .Fuel in the float chamber 53 probablystands at approximately the same evel as that in the tank 70. When thislevel rises sufficiently, the float 59 raises the valve 56 andinterrupts communication between the pumping chamber and the pipe 52.The next suction stroke of the piston 25 merely creates a partial vacuumin the pipe 52 whichi is relieved at the end of the stroke by airentering through port 8. This action continues until the 'fuel drawn offby the carbureter permits the float 59 to descend and open the valve 56when the pumping action is automatically resumed.

Certain features of my invention disclosed but not claimed herein aredisclosed and claimed in my copending application Serial No. 372,046,filed April 7 1920 for Vacuum feed systems to which application crossreference is hereby made.

I am aware that the particular embodiment of my invention abovedescribed, and illustrated in the accompanying drawings, is susceptibleof considerable variation without departing from the spirit thereof, andtherefore I desire to claim, my invention broadly as well asspecifically as indicated by the appended claims.

I claim as my invention:

1. In a li uid feed system, means for producing suction impulsesintermittently and for restorin approximately atmospheric pressure in te intervals between the suction 1mpulses, a low level main liquid tank,a high level 'rebeptacle, a pumpmg chamber in communication with saidtank and with said'receptacle, a connection between said first namedmeans and the top of "said pumping chamber, a float in said (pumpingchamber and a valve controlle by said float adapted to close saidconnectio 2. In a liquid feed system, means for pro- .ducing suctionimpulses intermittently and for restoring approximately atmosphericpressure in the intervals between the suction impulses, a low level mainliquid tank, a high level receptacle, a pumplng chamber in communicationwith said tank, a connec:

tion between said receptacle and chamber ing chamber and said main tank,a check valve adapted to close said connection, means for producingsuction impulses intermittently and for restoring approximatelyatmospheric pressure in the mtervals between the suction impulses, aconnection between said means and the upper part of said pumpingchamber, a float in sa1d pumpin chamber and a valve controlled by sa1dfloat adapted to close said last named connection.

4. In a liquid feed system, means for pro ducing intermittent suctionimpulses and for restoring approximately atmospheric .pressure in theintervals between the suction imulses; a low' level main liquid tank, a.high evel receptacle, a pumpin chamber in communication with said tanand said receptacle, and a connection between the suction producin meansand the top of saidpumping cham er.. 7

' 5. In a pump system for engines, the combination of a ump casing, apump chamber connected wit said casing, means in said casing forproducing suction impulses in said chamber, means for restorin thepressure in said pumpchamber to t at of the atmosphere in the intervalsbetween the suction impulses.

6. In a pump system, the combination of a pump'casing, plural recirocating mem bers within sa1d casi sai members 'recl rocating along paralelaxes, and sing 0 means for operating said members, one of saidreciprocatin members being provided with pressure r 'evi mechanism.

In testimony whereo I aflix my signature ERNEST R. HUN TLEY.

